DeepSeek-AI DeepSeek Harness up to 0.1.2-alpha.1 Control Plane missing authentication

Summaryinfo

A vulnerability has been found in DeepSeek-AI DeepSeek Harness up to 0.1.2-alpha.1 and classified as problematic. Impacted is an unknown function of the component Control Plane. This manipulation causes missing authentication. This vulnerability is handled as CVE-2026-82033. It is possible to launch the attack on the local host. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in DeepSeek-AI DeepSeek Harness up to 0.1.2-alpha.1. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component Control Plane. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

DeepSeek Harness prior to 0.1.2-alpha.2, and specifically commit 3e24087, contains a missing authentication vulnerability in its web profile HTTP and WebSocket RPC control plane, allowing any local process, including those running as a different OS user, to reach unauthenticated session methods such as session.create and session.prompt. Attackers can invoke session.prompt to trigger the agent's bash and filesystem tools, achieve arbitrary command execution as the victim user using their configured model credentials, intercept live session traffic and logs over the event mux stream, and bypass human tool-approval checks via POST /api/respond by matching only rpcId, approvalId, and sessionId values broadcast over the ungated stream.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-82033 since 08/27/2026. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Applying the patch 3e24087bfaeabe40b58ba2f7b936895b8f93fe27 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Artificial Intelligence Software

Vendor

• DeepSeek-AI

Name

• DeepSeek Harness

Version

• 0.1.2-alpha.0
• 0.1.2-alpha.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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